Tank-heater.



H. L. PERRIS.

TANK HEATER.

APPLICATION FILED DEC. 26, 1911.

Patented Apr. 16, 1912.

2 SHEETS-SHEET 2.

uniran STATES an oasis HENRY L. FERRIS, OF HARVARD, ILLINOIS, ASSIG-NOR TO HUNT, HELM, FERRIS & COMPANY, OF HARVARD, ILLINOIS, A CORPORATION OF ILLINOIS.

TANK-HEATER.

To all whom it may concern:

Be it known that I, HENRY L. FERRrs, a citizen of the United States, residing at Harvard, in the county of McI-Ienry and State of Illinois, have invented a new and useful Improvement in Tank-Heaters, of which the following is a specification.

My invention relates to certain new and useful improvements in tank heaters and is fully described and explained in the specification and shown in the accompanying drawings, in which:

Figure 1 is an elevation of the device showing its relation to the tank in which it 'a used; Fig.2 is a section on line 2 of Fig. 1; Fig. 3 is a vertical transverse section through the heater, and Fig. 4 is a vertical diametrical section.

Referring to the drawings, 5 is a fire pot preferably in the form of a cylinder with a horizontal axis shorter than the diameter. The fire pot has an upwardly opening neck 6 closed by a cover 7. In the lower part of the fire pot are two grate sections 8 pivot ally supported at their adjacent edges so as to be movable to the position shown in dotted lines, for the purpose presently to appear. The fresh air is led to the space below the grate through an inlet flue 9 running down one end of the heater.

In the normal operation of the device, the products of combustion ascend to the neck 6 and pass through an opening 10 into an annular eduction flue 11 which encircles the entire heater (except the neck) and terminates in a smoke pipe 12. The products of combustion thus rise in the fire pot, heating the ends of the heater, and then are led down under the fire pot and up again to the opposite side, being brought during their entire course through the eduction flue 11 into as intimate contact with the water in the tank as practicable. A highly efficient heater is thus provided.

For starting the fire a valve 13 is opened so as to connect the upper part of the fire potdirectly with the smoke pipe, as shown in dotted line in Fig. 3. After the fire is Specification of Letters Patent.

Application filed December 26, 1911.

Patented Apr. 16, 1912. Serial No. 667,704.

under way the valve may be closed and the normal operation will commence.

hen it is desired to clean out ashes one grate section is raised, dumping all its fire on the other. The ashes may then be removed from above with a proper scoop. Thereupon the grate section may be returned, the fire spread on it and fresh fuel may be added.

The manner in which the StOXG is made and assembled is of course unimportant. The drawings show one convenient method in which the fire pot and flue are cast in two parts bolted or riveted together, a central opening, closed by a removable plate 14, being provided at the bottom of the fire pot to give access to the eduction flue for cleaning it. This and similar details seem so obvious to one skilled in the art as to make further description superfluous.

I realize that considerable variation is possible in the details of this construction without departing from the spirit of my invention; therefore I do not intend to limit myself to the specific form herein shown and described.

What I claim as new and desire to secure by Letters Patent is 1. In a tank heater, a fire pot, a vertical air inlet flue at one end of the heater, an annular eduction flue encircling the entire heater and located in separated relation to said air inlet flue whereby the incoming air will not affect the temperature of the products of combustion passing through said eduction flue, the said heater being cast in two parts with flanges formed on the meeting faces of said parts, and means securing said flanges together.

2. In a tank heater the combination of a fire pot, a vertical air inlet flue, an annular eduction flue encircling the entire heater and located in separated relation to said air inlet flue whereby the incoming air will notafl'ect the temperature of the products of combustion passing through said eduction flue, a removable section in said annular eduction flue under the grate, whereby access is afforded the said last named flue for cleaning the same, the heater and educt-ion flue being cast in two parts, flanges on the meeting faces of said parts, and means for securing said flanges together.

3. In a tank heater, a fire pot, a vertical air inlet flue at one end of the heater, and an annular eduction flue encircling the entire heater and located in separated relation to said inlet flue, whereby the incoming air 10 will not affect the temperature of the products of combustion passing through said In presence of WV. J. HEATLEY, R. A. I-IEMENWAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

